Cummins 4955167 HE351W Turbocharger Assembly

The Cummins 4955167 is a Holset HE351W variable geometry turbocharger (VGT) assembly integrating an electronic actuator. It is calibrated for the Cummins ISB 5.9L common rail diesel engine platform, specifically covering 2003 to 2007 model year emissions regulations. The unit features a compressor wheel and turbine wheel assembly housed within a rotating bearing cartridge, controlled by the electronic actuator to modulate boost pressure across the operating range. This turbocharger serves as direct OEM replacement for medium duty cab chassis applications utilizing the ISB 5.9L powerplant. Technical specifications include a wastegate-free VGT mechanism, water-cooled bearing housing, and flanged turbine inlet/outlet connections matching the OEM exhaust manifold and downpipe interface. The assembly is supplied as a complete unit including the actuator, requiring ECU calibration or relearn procedure upon installation per Cummins service bulletin.